基于at89c52单片机超声波测距仪的设计毕业论文

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1、SXPI基于AT89C52单片机超声波测距仪的设计BASEDONAT89C51ULTRASONICRANGEFINDERDESIGN学生姓名学院名称专业名称指导教师0SXPI目录摘要···········································11绪论············································31.1课题研究的背景··································31.2课题提出及研究的意义····················

2、········41.2.1课题的提出···································41.2.2课题的研究意义·······························42超声波的介绍和超声波的测距原理··················42.1超声波的介0SXPI绍····································42.1.1什么是超声波········································42.1.1超声波的特性及特点··········

3、························42.1.3超声波的应用········································52.2超声波测距的原理及误差分析······················52.2.1超声波的测距原理····································52.2.2超声波的误差分析····································62.3单片机实现测距原理·································

4、···70SXPI3系统硬件设计····································73.1系统结构设计····································73.2单片机AT89C52最小系统··························83.2.1单片机的功能········································83.2.2主要性能参数········································93.2.3AT89C52的管

5、脚说明··································93.3DS18B20温度传感器简介··························113.4T40R40超声波传感器简介························113.4.1超声波传感器的基本介绍······························0SXPI113.4.2超声波传感器的基本原理······························123.5LM7805稳压集成电路···················

6、··········123.5.1LM7805介绍·········································123.5.2LM7805特点··········································123.5.3LM7805实际应用······································123.6LM567锁相环····································133.6.1LM567概述····················

7、·······················133.6.2LM5670SXPI功能叙述······································133.6.3LM567主要参数······································133.7超声波发射器电路································143.8超声波检测接受电路······························153.9显示电路···························

8、·············153.10LM7805电平转换电路····························163.11AT89C52复位电路·······························164系统软件设计····································170SXPI4.1子程序设计······